Adding 12v lighter socket to 6v jeep

1941 - 1945, MB, GPW modifications, sugestions, and ideas, official MWO's and unofficial WWII field mods NO EBAY or COMMERCIAL SALES.
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Tim52
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Adding 12v lighter socket to 6v jeep

Post by Tim52 » Sun Mar 26, 2017 3:12 pm

I just added a 6 volt-to-12 volt converter to install a 12 volt cigarette lighter.

The converter was available on Amazon for about $12. It's small enough to fit unobtrusively under the dash lip. The cigarette lighter socket was purchased at NAPA for about $8 fit’s nicely as well.

I know that the current converter placement (not visible) just inches to the left of the socket would interfere with a future first aid kit bracket but I’ll move it later.

A cell phone it draws about half an amp from the 6v side when charging well within the converters 2 amp 12 v output. The converter circuit draws about 5 milliamps with no load. That’s not much but I will add a switch to the 6 volt input side to turn it completely off. I currently have it connected directly to my battery. Adding a 5 amp fuse would be good as well.
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Note: The display indicates negative volts because my meter leads were switched
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CDR USN (RET)
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Re: Adding 12v lighter socket to 6v jeep

Post by Ben Hovis » Sun Mar 26, 2017 5:10 pm

Very good Tim. Been looking for how to do this for years. Low cost too.
Thanks for taking the time to figure it out.
Ben
http://www.jarheadjeep.com[url]
MB Body # 204065 date 1/19/43
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Re: Adding 12v lighter socket to 6v jeep

Post by gearhead » Mon Mar 27, 2017 6:20 pm

I hid one under the dash of my GPW, only use it for my GPS/speedo.
GPS adapter changes input voltage to 4.3 volts, works a charm with 6v. Drove 400 mile trip no issues.
My cell phone will charge (all be it slowly) with as low as 5v (current droid prefers 9v but charges on 5V).

Ed S :)
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Mike Soltis
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Re: Adding 12v lighter socket to 6v jeep

Post by Mike Soltis » Fri Mar 31, 2017 6:19 am

Tim can you tell me/us where you wired this too? I've been looking to do this as I'm sure others are also It would be great to add a gps if needed to my GPW. Thanks in advance for your help MLS
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tamnalan
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Re: Adding 12v lighter socket to 6v jeep

Post by tamnalan » Fri Mar 31, 2017 7:18 am

If you connect it to wire E1 at the filtrette then you will have a switched 12V power supply. That's what I did anyway.

http://www.1945gpw.com/img/1945gpw/HowT ... iagram.pdf
Alan W. Johnson
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Tim52
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Re: Adding 12v lighter socket to 6v jeep

Post by Tim52 » Fri Mar 31, 2017 9:01 am

Hi Mike,

Good question. There are several ways to approach this.

For now I have it connected to the battery side of my starting solenoid which connects to my foot switch. The solenoid was there when I bought my jeep and since it's not really visible, I kept it. Alternatively, you could connect it to the battery side of your foot starter. Adding an in-line 4-5 amp fuse and switch hidden under the dash to completely shut the converter circuit off is optional, but probably good to do as well.

I originally connecting it thru the ignition switch as Alan describes (my late jeep does not have a filtrette) but changed to the above connection just to have things more isolated. This also avoids running extra current thru my $50 reproduction ignition switch.

As a tangential note what Ed S. states is true, one could argue that using a converter to change 6v -> 12v -> 4-5 v for USB is not really necessary. Regardless, the converter gives you more options to power 12v devices like GPS and a 12v dwell/tach meter. Besides it was fun to do for a class of 1974 Purdue University Electrical Engineer :D

Tim
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45 GPW 271750
frame/engine match no data plates (DoD est. July 5 '45)

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Mike Soltis
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Re: Adding 12v lighter socket to 6v jeep

Post by Mike Soltis » Fri Mar 31, 2017 5:49 pm

Tim & Tamnalan thanks for getting back Mike
1942 GPW 81835 Chester, PA. USA 20186310
1946 Bantam T3C
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